Restructuring Programs (Schedule of Changes in Restructuring Program Liabilities) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020		Jun. 30, 2019	Jun. 30, 2018
Restructuring Reserve [Roll Forward]
Restructuring liabilities, beginning balance	$ (40)		$ (37)	$ (93)
Additions	(451)		(26)	(11)
Payments	423		23	66
Other				1
Restructuring liabilities, ending balance	(68)		(40)	(37)
One-time Termination Benefits
Restructuring Reserve [Roll Forward]
Restructuring liabilities, beginning balance	(40)		(37)	(93)
Additions	(24)		(26)	(11)
Payments	26		23	66
Other				1
Restructuring liabilities, ending balance	(38)		(40)	(37)
Contract Termination Costs
Restructuring Reserve [Roll Forward]
Restructuring liabilities, beginning balance	0		0	0
Additions	(427)		0	0
Payments	397	[1]	0	0
Other				0
Restructuring liabilities, ending balance	$ (30)		$ 0	$ 0

[1] Includes the write-off of approximately $75 million of programming rights advances.